Potion Factory has released a beta release of Tangerine, an application designed to create playlists based on the BPM and beat intensity of the songs in your iTunes library.

“We came up with the idea after I noticed that I was spending a good 30 minutes to come up with about 30 tracks for working out. I would repeat the process fairly often and I was getting tired of it and tired of listening to the same songs over and over again. So we developed Tangerine to automate that process. The app should pay for itself for some people. It should be really handy for Nike+ users and if you‚Äôre not, this app may motivate you to get one because there‚Äôs nothing like running to the beat of the music to keep you motivated,” they note.

The app is Mac OS X Tiger only, and is limited to ripped tracks because it can’t analyze tracks encrypted with Apple’s DRM.